Citation: ZHANG Peng-qi, YANG Qi-qi, TU Ka-bin, WANG Yue-lun, WANG Zu-wei, LIU Lin-lin, ZHANG Hong. Research on the uneven ash melting behavior of pulverized Jincheng coal[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(1): 8-14. shu

Research on the uneven ash melting behavior of pulverized Jincheng coal

1.
Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining and Technology, Xuzhou 221116, China
2.
Zhoushan Entry-exit Inspection and Quarantine Bureau, Zhoushan 316021, China

Corresponding author: ZHANG Hong, hzhang@cumt.edu.cn
Received Date: 19 July 2017
Revised Date: 9 November 2017

Fund Project: The project was supported by the National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation(U1510106)National Natural Science Foundation of China and Shanxi Low Carbon Coal Foundation U1510106

Figures(9)

According to the contradiction between ash melting theory and practice, an uneven melting theory was proposed. A typical Jincheng coal from Shanxi, China, was selected, which was ground into the particle size similar to the industrial use. It was separated into different density fractions through float and sink tests, and its chemical composition and mineral composition were analyzed with XRF and XRD, respectively. Ash fusion temperatures (AFTs) under light reducing atmosphere and the pressure-drop temperature(PDT) were tested. SEM-EDX was also employed to observe the melting behavior. It is found that the softening temperature of Jincheng coal is 1501℃, while that of its density fractions changes from 1292℃ to 1600℃. The sintering temperature changes from 833℃ to 943℃, while that of the raw coal ash was 885℃. The study of mechanism shows that the difference of melting and sintering behaviors is caused by the segregation of chemical composition in different density samples, mainly Al₂O₃, Fe₂O₃ and SO₃.
- Jincheng coal,
- density fraction,
- ash melting behavior,
- slagging
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沈阳化工大学材料科学与工程学院沈阳 110142